package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exceptionhandler.GuLiException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    public EduSubjectService eduSubjectService;
    public SubjectExcelListener() {}
    public SubjectExcelListener(EduSubjectService eduSubjectService) {
        this.eduSubjectService = eduSubjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {

        //读取excel，一行行读取
        if (subjectData==null){
            throw new GuLiException(20001,"文件数据为空");
        }

        //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        EduSubject exitOneSubject = this.existOneSubject(eduSubjectService, subjectData.getOneSubjectName());
        if (exitOneSubject==null){ //没有相同一级分类，进行添加
            exitOneSubject = new EduSubject();
            exitOneSubject.setParentId("0");
            exitOneSubject.setTitle(subjectData.getOneSubjectName());
            eduSubjectService.save(exitOneSubject);
        }

        //获取一级分类id
      String pid=  exitOneSubject.getId();
        //二级分类添加
        EduSubject existTwoSubject  = this.existTwoSubject(eduSubjectService, subjectData.getTwoSubjectName(), pid);
        if (existTwoSubject ==null){ //没有相同一级分类，进行添加
            existTwoSubject  = new EduSubject();
            existTwoSubject .setParentId(pid);
            existTwoSubject .setTitle(subjectData.getTwoSubjectName());
            eduSubjectService.save(existTwoSubject );
        }

    }



    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService eduSubjectService,String name){
        QueryWrapper<EduSubject> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("title",name);
        queryWrapper.eq("parent_id","0");
        EduSubject oneSubject = eduSubjectService.getOne(queryWrapper);
        return oneSubject;
    }


    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService eduSubjectService,String name,String pid){
        QueryWrapper<EduSubject> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("title",name);
        queryWrapper.eq("parent_id",pid);
        EduSubject twoSubject = eduSubjectService.getOne(queryWrapper);
        return twoSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
